Method op



ROTARY STEAM ENGINE.

No. 6,698. Patented Sept. 4, 1849.

m: NORRIS Perms no. mom-Luna, wasnmumu u L ATSENT "anion.

o. M. MILES, 'or iiizoclrwhrviilnn, Pt'iNNsYhvXNIA.

METHOD or gREVERSI NG BEAG TiNG ROTARY ENeINEs.

Specification ofLetters'PatentiNo. 6,698, dated September 4, 1849.

To all whom it may concern Be it known that, I, C;

' 'Brockwa-yville, in theT'cOuiity of J eflerson" and State of Pennsylvania-have invented a 1 new and useful Improvement on Steam-Engine; and'I'do hereby-damethati the following is aclear, accurate, and com plete description of my invention,-reference being made therein to the: annexed draw ings', in which similar letters always 'indi-' cate like parts. V

Lzlteml referenoee.,Figure 1 is a side view of the engine. Fig. 2jis ia to-p' view jof'f the same. Fig. 3 isla plan of theesca'pe-fl. j

tube and reverse-action rod; Fig. 4 is an inside view of the enginejFig. 5.-is.a.sec- 'tion of the escape tube.

The nature of. my invention consists in the construction of a rotary steam engine, the peculiar and important feature of which is, the employment of an escape tube havmg two reversed elbows at its extremities, enlarged toward their .IIlOllthS, like "a,

trumpet, thus affording an opportunity of great and rapid expansion to the steam,

which thereby gives motion to the engine I by counter-pressure.

To enable others skilled 'in the alrts to" understand and use my invention, I proceed to describe the same.

A horizontal view of the engine, when inposition for working, is represented by 1; the casing is made in two parts A, turned and fitted to each other on' their inner, faces so as tobe perfectly steam-tight, and slightly convex on their outside, forming a compressed spheroidal body, the material of which may be cast iron or other metal. It is placed on a vertical hollow shaft B, B, to which it is secured on the lower side by the nut a, which works on a screw, cut on said shaft, and which draws together the two sections of the casing, the upper one lying against the shoulder b, which is likewise on said shaft. Running at right angles to, the

through it also, is adouble escape tube, the two ends of which are reversed elbows a, u,

with trumpet mouths-shown in the other: 7 "figures. i

A top view of the engine is exhibited by Fig. 2.

[In Fig. 3, may be seen the scapetubes p C, C, detached, and in connection with 't] reverse-action rod 0?, which is inserted 1 I the u'pper part of the hollow shaft B, l having one end projecting out of the to a. little way,to serveas ahandle for inovir itgthe other endrbeing made in, re ct-iline: form with a rack,[e,= upon it, which mesh in asmall pinion f, placed in the midd of the double escape-tube C, C. By slidir the rod cZ,Q;upor down, the rack turns tl p1nion-and-, with it the double escap'e tub reversing-the elbows o, a, and thus ic h'an';

fmggthe movement/of the engine .at pleasur Fig. 4;, is represented an interiorrpla of the engine, showing the steam 'chambl g, 9, g, g, which, is a cylindrical cavity, on

half 1n eachfsectiofi} of th'e oasing Tl connecting port-ion of the escape tubes *0, runs longitudinally through the. stean chamber, from which the steam escapes-int the tubes through the vent-holes'h, h, an from thenceout at the mouths D, D: The] are four vent-holes,ftwo to each tube,o opposite sides, as seen in Fig. '3. From tl steam-chamber to the periphery of the ca: ing, the escape-tubes are nicely fitted in tl casing, so as to 'turn freely when the actio of the engine needs reversing, by themear before explained, and the tubes may it packed in the usual way, if necessary, t render them perfectly steam-tight in the ca: ing. The steam is received into the chambe from the'hollow shaft B, B, into which-f is admitted under the step or bottom su port; it passes fromthe chamber throug the vent-holes h, 71, into the tubes 16, C, an out at the mouths D, D, the peculiar cor formation of which, expanding outwar from the elbows 0, '0, enables the steam t exert the expansive force upon their side: and thus by counter pressure thereon, give motion to the engine. Having thus explained my invention claim 1 The mode of reversing the motion of th engine, by a rack passing through the shad thereof and meshinginto apinion on th revolving nozzles in the manner substar tially as herein described.

O. M. MILES.

Witnesses:

S. R. JENKINS, JOHN WINKLEBLEGI-I. 

